892= ____

ক (90-1)2
খ 902
গ 12
ঘ 92

সঠিক উত্তর: (90-1)2

If we have to find the square of the number which is near 0 we use the second variation i.e. (90-1)2. This would help us and make the calculations easier. Therefore (90-1)2= 902-2×90×1+12 Therefore (90-1)2= 8100-180+1 Therefore (90-1)2=7921.
Bissoy MCQ
#Class 8 Maths #Finding the Square of a Number

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